Comparison of Polymeric Clips and Endoscopic Staplers for Laparoscopic Appendectomy.

INTRODUCTION: Appendectomy is the most common pediatric surgical procedure. To decrease the cost and environmental impact of single incision pediatric endosurgery (SIPES) appendectomy, we switched from using endoscopic staplers to polymeric clips placed with nondisposable laparoscopic appliers. The aim of this study was to compare the resulting reduction in cost and amount of waste generated per case, as well as to compare the perioperative variables and outcomes in patients in whom clips were used, with those of historical patients in whom staplers were used. MATERIALS AND METHODS: Retrospective chart review of SIPES appendectomies was performed and patients in whom clips were used were compared with patients in whom staplers were used. Demographic, operative, and clinical data were collected. t-Test, Mann-Whitney test, and chi squared test were used to analyze the data as appropriate. The cost to the hospital of the clips and staplers was compared. The disposable waste generated from clips and the staplers was weighed. RESULTS: A total of 246 patients were included: 111 in stapler group and 135 in clip group. There were no statistically significant differences between the groups in operative time, estimated blood loss, length of stay, and complications. There were no complications related to use of clips. In the clip group, staplers were used in 10% because base of appendix was too large, gangrenous, or perforated and could not be clipped. Use of polymeric clips was less expensive and generated less waste. CONCLUSIONS: Use of polymeric clips for appendectomy is safe and effective, and results are comparable with those of stapling. Based on our data, in 90% of appendectomies, the base of appendix is amenable to clipping. This study supports use of clips over staplers to decrease cost and environmental impact.

Same day discharge after thyroidectomy is safe and effective.

Historically, thyroidectomies have been performed as inpatient operations due to concerns of postoperative bleeding and symptomatic hypocalcemia. We aim to demonstrate that outpatient thyroidectomy can be performed safely. METHODS: This report outlines a 7-year retrospective analysis (2009-2016) of outpatient vs inpatient thyroidectomies, with outcomes including hematoma, blood loss, recurrent laryngeal nerve injury, symptomatic hypocalcemia, and postoperative emergency room (ER) visits. RESULTS: A total of 1460 thyroidectomies were performed: 1272 (87%) outpatient and 188 (13%) inpatient. Five outpatients: 4 total thyroidectomies (TT), 1 TT with a central lymph node dissection (CLND), and 1 partial thyroidectomy (PT) developed postoperative hematomas (0.34%) at post-discharge hour 3, 9, 10, 13, and 42. Average time to discharge was 2 hours and 37 minutes. Hematomas were evacuated successfully in the operating room under local anesthesia with a 2-day average hospital stay. There were no differences between TT, thyroid lobectomy (TL), and PT procedures for postoperative hematoma (p=0.17). Outpatient compared to inpatient thyroidectomy was more likely to have been performed in patients with lower American Society of Anesthesia scores (2.3 vs 2.9, p<0.0001), less mean blood loss (74 vs 227 ml, p<0.0001), lesser age (52 vs 56 years, p=0.0012), less extensive dissection (p<0.0001), and fewer RLN injuries (2.4% vs 8.5%, p<0.0001). There was no difference between outpatient and inpatient symptomatic hypocalcemia (6.3% vs 9.6%, p=0.09), 30-day postoperative ER visits (8.8% vs 9.6%, p=0.73), and postoperative hematoma (0.39% vs 0%, p=0.39). There was one inpatient mortality from stroke. CONCLUSION: Postoperative hematomas can be managed safely without life-threatening complications suggesting outpatient thyroidectomy can be performed safely by an experienced surgeon, and adverse sequelae dealt with in a safe and effective manner.

BCL6 Antagonizes NOTCH2 to Maintain Survival of Human Follicular Lymphoma Cells.

Although the BCL6 transcriptional repressor is frequently expressed in human follicular lymphomas (FL), its biological role in this disease remains unknown. Herein, we comprehensively identify the set of gene promoters directly targeted by BCL6 in primary human FLs. We noted that BCL6 binds and represses NOTCH2 and NOTCH pathway genes. Moreover, BCL6 and NOTCH2 pathway gene expression is inversely correlated in FL. Notably, BCL6 upregulation is associated with repression of NOTCH2 and its target genes in primary human and murine germinal center (GC) cells. Repression of NOTCH2 is an essential function of BCL6 in FL and GC B cells because inducible expression of Notch2 abrogated GC formation in mice and killed FL cells. Indeed, BCL6-targeting compounds or gene silencing leads to the induction of NOTCH2 activity and compromises survival of FL cells, whereas NOTCH2 depletion or pathway antagonists rescue FL cells from such effects. Moreover, BCL6 inhibitors induced NOTCH2 expression and suppressed growth of human FL xenografts in vivo and primary human FL specimens ex vivo These studies suggest that established FLs are thus dependent on BCL6 through its suppression of NOTCH2Significance: We show that human FLs are dependent on BCL6, and primary human FLs can be killed using specific BCL6 inhibitors. Integrative genomics and functional studies of BCL6 in primary FL cells point toward a novel mechanism whereby BCL6 repression of NOTCH2 drives the survival and growth of FL cells as well as GC B cells, which are the FL cell of origin. Cancer Discov; 7(5); 506-21. ©2017 AACR.This article is highlighted in the In This Issue feature, p. 443.